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【单选题】
—Guest: Oh, it’s ten o’clock. I’d better go now.—Host: ____.

OK. Please walk slowly and take care.
Why do you want to go now? Don’t you want to stay?
Yeah, it’s really late. Why not immediately?
Won’t you stay for another cup of coffee?
【单选题】
在2HCHO+NaOH(浓)→HCOONa+CH3OH中,HCHO(甲醛)(  )。

未被氧化,未被还原
仅被氧化
仅被还原
既被氧化,又被还原
【单选题】
21.—I went to visit Xi`an City Wall yesterday afternoon. ---Oh, did you ? _______.

SodidI
SoIdid
NeitherdidI
NordidI
【单选题】
石灰(CaO)加水之后水化为熟石灰[Ca(OH)2]的过程,称为( )。

石灰的硬化
石灰的熟化
石灰的陈伏
石灰的老化
【单选题】
—I’ve got an offer in New York. —Oh, ____! But I’m going to miss you.

That’s too bad
I’m sorry
I beg your pardon
That’s great
【单选题】
A: Itll take at least 2 hours to do this! B: Oh, [填空]! I could do it in 30 minutes.

come on
pardon me
you are right
dont mention it
【单选题】
—I’m sorry to keep you waiting. —Oh, not at all. I___ here only a few minutes.

have been
had been
was
will be
【单选题】
----Amy, I called you yesterday evening, but nobody answered the phone.----Oh, I _______ a walk with my mother at that time.

take
took
am taking
was taking
【单选题】
A: Were having a few people over for dinner Saturday. [填空] B: Oh, thank you. That would be great.

Are you doing anything then?
Wed love to have you around.
Itll be a lot of fun.
Have you heard about it?
【单选题】
---Why didn’t John call me ? ---Oh, his cell-phone ran out of power, otherwise he______ you.

had called
would have called
called
would call